Given a string, return the first recurring character in it, or null if there is no recurring character.
For example, given the string "acbbac", return "b". Given the string "abcdef", return null.
| Name | Name | Last commit date | ||
|---|---|---|---|---|
parent directory.. | ||||
Given a string, return the first recurring character in it, or null if there is no recurring character.
For example, given the string "acbbac", return "b". Given the string "abcdef", return null.